import Vue from 'vue'
import VueRouter from 'vue-router'


import Login from '../components/Login.vue'
// const Login = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Login.vue')
import Home from '../components/Home.vue'
// const Home = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Home.vue')
import Welcome from '../components/Welcome.vue'
// const Welcome = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Welcome.vue')

import User from '../components/user/User.vue'
// const User = () => import(/* webpackChunkName: "User_Rights_Roles" */ '../components/user/User.vue')
import Rights from '../components/power/Rights.vue'
// const Rights = () => import(/* webpackChunkName: "User_Rights_Roles" */ '../components/power/Rights.vue')
import Roles from '../components/power/Roles.vue'
// const Roles = () => import(/* webpackChunkName: "User_Rights_Roles" */ '../components/power/Roles.vue')

import Cate from '../components/goods/Cate.vue'
// const Cate = () => import(/* webpackChunkName: "Cate_Params" */ '../components/goods/Cate.vue')
import Params from '../components/goods/Params.vue'
// const Params = () => import(/* webpackChunkName: "Cate_Params" */ '../components/goods/Params.vue')

import GoodsList from '../components/goods/List.vue'
// const GoodsList = () => import(/* webpackChunkName: "GoodsList_Add" */ '../components/goods/List.vue')
import Add from '../components/goods/Add.vue'
// const Add = () => import(/* webpackChunkName: "GoodsList_Add" */ '../components/goods/Add.vue')

import Order from '../components/order/Order.vue'
// const Order = () => import(/* webpackChunkName: "Order_Report" */ '../components/order/Order.vue')
import Report from '../components/report/Report.vue'
// const Report = () => import(/* webpackChunkName: "Order_Report" */ '../components/report/Report.vue')

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/users', component: User },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: Cate },
      { path: '/params', component: Params },
      { path: '/goods', component: GoodsList },
      { path: '/goods/add', component: Add },
      { path: '/orders',component:Order},
      {path: '/reports',component:Report}
    ]
  }
]


const router = new VueRouter({
  routes
})

//为路由对象，添加beforeEach 导航守卫
router.beforeEach((to, from, next) => {
  //to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  //next（） 放行  next（'/login'） 强制跳转
  //如果用户访问登录页，直接放行
  if (to.path === '/login') return next();
  //从sessionStorage中获取token
  const tokenStr = window.sessionStorage.getItem('token')
  //没有token，强制跳转到登录页面
  if (!tokenStr) return next('/login')
  next()
})

export default router
